Question

Assertion (A): Right internal jugular vein is preferred for central venous pressure monitoring. Reason (R): It has a straight course.

• A. Both A and R are individually true and R is the correct explanation of A
• B. Both A and R are individually true but R is NOT the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true

Hint:

Compare the path each central vein takes to reach the right atrium.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
The question asks whether the right internal jugular vein really is the preferred site for central venous pressure catheterisation, and whether the given reason correctly explains why.

Step 2: Key Concept or Approach:
A central venous catheter needs to sit near the cavoatrial junction, so the ideal access vein offers a short, straight, low-resistance path to the right atrium, minimises the chance of the tip curling or malpositioning, and is technically easy and safe to cannulate.

Step 3: Working Through the Options:
A is true, the right internal jugular vein is the most commonly preferred site for CVP monitoring. R is also true, and it is the correct explanation, because the right internal jugular vein runs nearly in a straight line through the right brachiocephalic vein into the superior vena cava, whereas the left internal jugular vein has to cross the mediastinum through a more angulated brachiocephalic vein, and the subclavian route carries a higher risk of pneumothorax. This straight, direct course is exactly why the right internal jugular vein gives more reliable catheter tip placement with fewer complications.

Step 4: Conclusion:
Both statements are true, and R correctly explains A, matching the option stating both are true with R as the correct explanation.